This report makes the case that no one is in charge of protecting children from harmful environmental exposures at school and recommends steps at the federal and in New York State to begin to address this hidden world. With information gleaned from adult occupational health experts, from new national studies and reports, and from the reports of parents of health-affected school children, it outlines the scope of the public health response needed to resolve the nations' largest unaddressed children's health problem: millions of children attend polluted schools that daily erode health and learning. The recommendations presented in this report are proposed by Healthy Schools Network. [Funding for this report was provided by the New York Community Trust Henry Philip Kraft Fund.]